The Journal of The Korea Institute of Intelligent Transport Systems (한국ITS학회 논문지)

The Korea Institute of Intelligent Transport Systems (한국ITS학회)
권호 표지
DOI QR코드

DOI QR Code

Space Diversity Combining Scheme Using Phase Difference between Main and Diversity Signals

메인과 다이버시티 신호사이 위상차를 이용한 공간 다이버시티 결합방법

  • 정길영 (삼육대학교 컴퓨터학부)
  • Received : 2015.08.30
  • Accepted : 2015.09.14
  • Published : 2015.10.31
Download PDF
⟨ Previous Next ⟩

Abstract

The deployment of high capacity backhaul is required due to explosive growth in mobile data services. For rapid backhaul deployment, point to point microwave is a much easier and cheaper technology. The space diversity scheme is used in point to point microwave links. The purpose of space diversity is to overcome fading by combining signals from two separate receiver antennas. For signal combining algorithm, maximum power and minimum distortion methods were used and these algorithms were reported not to be good enough for robustness in selective fading. In this paper, a more practically efficient signal combining scheme from the main and diversity branch is proposed and evaluated in selective fading channel. The proposed algorithm has shown significant performance improvement in terms of signal spectrum.

모바일 데이터의 급속한 성장으로 인해 대용량의 백홀 구축 요구가 대두되었으며, 비용 효율 관점에서 쉽게 적은 비용을 가지고 백홀을 신속하게 구축할 수 있는 기술은 점대점 마이크로웨이브이다. 점대점 마이크로웨이브 링크에서의 공간 다이버시티 방법은, 두 개의 수신 안테나에서 오는 신호를 결합시킴으로 페이딩효과를 상쇄시켜 성능을 향상시키는 것이다. 기존의 신호 결합방법으로는 최대 전력 방법과 최소 왜곡 방법이 제안되었다. 하지만, 선택적 페이딩 채널에서 두 기법 모두가 알고리즘의 강건성 관점에서 성능저하가 보고되었다. 그래서, 본 논문에서 현실적 관점에서 효율적이며 더 성능이 향상된 신호결합 기법을 제안하고, 시뮬레이션을 통해 제안된 방법이 신호의 스펙트럼 관점에서 상당한 성능의 향상이 있음을 보인다.

Keywords

References

  1. S. E. Hong, "Trends of technology developments for mmWave-based 5G mobile communications", ETRI Electronics and Telecommunications Trends, Vol. 28, no. 6, pp. 107-117, 2013.
  2. Ilisevic, D. and Banovic-Curguz, N., "Synchronization in mobile backhaul using hybrid microwave links", IEEE Telecommunications Forum (TELFOR), 21st, pp.208-211, 2013.
  3. S.W. Hong and H.Y. Ryu, Technical, "Trend of Backhaul for Fixed Mobile Convergence", ETRI Electronics and Telecommunications Trends, Vol. 25, no. 6, pp.71-82, 2010.
  4. Stuart Little, "Is microwave backhaul up to the 4G task?", IEEE Microwave Magazine, pp.67-74, Aug. 2009.
  5. Harvey Lehpamer, Microwave Transmission Networks: Planning, Design, and Deployment, 2nd Ed., McGraw-Hill, 2010.
  6. P. D. KARABINIS, "Maximum-Power and Amplitude-Equalizing Algorithms for Phase Control in Space Diversity Combining", The Bell system Technical Journal Vol. 62, no. 1, pp.63-89, Jan. 1983. https://doi.org/10.1002/j.1538-7305.1983.tb04379.x
  7. York Y. Wang, "Simulation and Measured Performance of a Space Diversity Combiner for 6 GHz Digital Radio", IEEE Transactions on communications, Vol. Com-27, no. 12, pp.1896-1907, Dec. 1979.
  8. Ericsson, Implementation Sketch Space Diversity Combiner, 2008.
  9. Roger, L. Freeman, Fundamentals of telecommunications 2nd Ed., John Wiley & Sons Inc, 2005.
  10. Rummler, W. D., "A New Selective Fading Model: Application to Propagation Data", Bell System Technical Journal, Vol. 58, Issue 5, pp.1037-1071, May-June, 1979. https://doi.org/10.1002/j.1538-7305.1979.tb03335.x
  11. John G. Proakis, Digital Communication, 3rd Ed., McGraw-Hill, 1995.
  12. ETSI EN 301 126-1v1.1.2, Fixed Radio Systems; Conformance testing; Part 1:Point-to-Point equipment-Definitions, general requirements and test procedures, 1999.
  13. Harvey Lehpamer, Microwave Transmission Networks: Planning,Design, and Deployment, 2nd Ed., McGraw-Hill, 2010.
  14. Trevor Manning, Microwave Radio Transmission Design Guide, 2nd Ed., Artech House, 2009.